Money guide

Salary sacrifice, explained properly

Updated 3 August 2026 · 6 min read

Salary sacrifice sounds like you're giving something up. In practice it's usually the opposite: you agree to a lower gross salary, and in return your employer buys you something — pension contributions, an electric car, sometimes a bike or extra holiday. Because the money never counts as your pay, it never gets taxed as your pay.

Why it saves you money

Your salary is hit by income tax and National Insurance before it reaches you. Sacrifice £100 of gross salary and you don't pay either on it. For a basic-rate taxpayer that £100 would have arrived as about £72 in your pocket; for a higher-rate taxpayer, about £58. So the same £100 of "spend" costs you dramatically less than paying for the thing out of your take-home.

Pensions: the boring one that wins

Sacrificing into your pension is the cleanest version. You avoid tax and NI on the contribution, and many employers pass on some of their own NI saving too. The catch is obvious and worth saying: the money is locked away until pension age. That's a feature if you're saving for retirement, and a genuine problem if you'll need it next year.

Electric cars: why the numbers look mad

This is the one people don't believe. Petrol and diesel company cars carry a hefty Benefit-in-Kind (BiK) tax charge based on emissions — up to 37% of the car's list price. Electric cars are taxed at just 4% of list price in 2026/27, rising slowly in later years.

So the deal works like this: you give up gross salary (saving income tax and NI), and in exchange you pay tax on a very small benefit. A £500-a-month EV lease can end up costing a higher-rate taxpayer well under £350 a month in real terms.

Two honest warnings. Lease agreements are typically two to four years and hard to exit — if you leave the job, it can get expensive or the car goes back. And the BiK rate is scheduled to rise, so the deal gets slightly worse over time.

When salary sacrifice is a bad idea

• It can't take you below minimum wage. Employers won't allow a sacrifice that breaches it.
• It lowers your official salary. Mortgage lenders often assess the reduced figure, which can shrink what you can borrow. If you're buying soon, think twice.
• It can affect statutory pay. Maternity pay, sick pay and some benefits are based on your earnings — a big sacrifice can reduce them.
• It reduces your NI record contributions base in some circumstances, which matters if you're near the edge of qualifying years.

The clever use nobody mentions

Because sacrifice reduces your taxable income, it can pull you back under a threshold that would otherwise cost you badly — most notably the £100,000 point where the Personal Allowance starts disappearing, and the £60,000 point where the High Income Child Benefit Charge begins. Sacrificing just enough to drop under one of those lines can be worth far more than the contribution itself.

Written in plain English by mytakehome.money. General information, not financial advice — check anything important at gov.uk or with a qualified adviser.